How do I use an infrared heat cabin?

KLAFS FAQ for well-being 

Before and after entering a heat cabin, make sure you drink plenty of water. Eating fruit will also help normalise your calcium level. However, you should not go into an infrared cabin on a full stomach. The cabin should be heated to 35°-40°C. Wash and dry yourself thoroughly. Each round should last for 20 to 30 minutes. Whilst in the cabin, sit or lie down as you wish. If you feel at all unwell during the session, you should leave the cabin. Afterwards, we recommend you take a lukewarm or warm shower, and rest for 10 to 20 minutes.